Brough



(No Model.)

R. A. CHESEBROUGH. APPARATUS Fon ooNTINUoUs DIsTILLATIoN.

No. 524,704. Patente'd Aug. 21, 1894.

; 1 UNITED STATES gPATENT OFFICE.

ROBERT A. OHESEBROUGH, OF NEW YORK, N. Y.

APPARATUS FOR CONTINUOUS DISTILLTION.

SPECIFIGATION forming part of Letters Patent No. 524,704, dated August 21, 1894. Application filed October 17, 1891. Serial No. 409.033. (IIO model.)

a apparatus for continuous distillation for obtaining the residuum and various distillates of petroleum, with a view to providing simple and economical means for subjecting the crude oil and its distillates, with great prec1s1on, to a predeterminal degree of heat throughout their passage through the still and thereby obtaining a residuum and one or more distillates of uniform quality.

A practical embodiment of my invention is represented in the accompanying draw- 1ng`which represents a series of four stills, a condenser, and the inlet, outlet and connectlng pipes employed in connection therewith.

The stills are represented by A B C and D and may be formed gradually diminishing in slze as shown or they might be made of the same size. They are connected at their upper ends by pipes aI b andc andapipedleads from the upper end of the last still toa worm e within a condenser E.

Bafile plates a' b' and c' depend into the upper ends of the stills B O and D to prevent the passage of the vapor across the top of the still and to direct it downwardly into contact With the distributing plates within the stills.

Each still is provided with series of distributing plates F which extend downwardly and inwardly alternately from opposite sides of the still, and have their inner ends arranged to overlap, so that the oil is caused to flow from one to another along down the series and thus becomes wholly exposed to the temperature within the still. The plates F may be either perforated or not as found most expedient.

From the bottoms of the stills outlet pipes a,2 192 02 and d2 lead to their respective discharge pipes g g' 9293 located conveniently in a common cooling trough G. i

The crude oil is admitted into the top of the first still by a pipe I-I provided with a stop cock h.

The temperature within the first still is maintained at the proper degree, (500 for example,) by a supply of super heated steam admitted into the lower portion of the still through a pipe I provided with a stop cock i. The succeeding still B, has a steam pipe l' provided With a stop cock fi' in communication with its lower portion by means of which the temperature of that still is maintained at the desired lower temperature, (350 for examp1e,) in case the steam passing over from the first still fails to keep the still B at the desired temperature. r The succeeding still O is in like manner provided with a steam supply at a still lower temperature for maintaining the temperature in that still at the desired degree, (212 for example,) and the last still D is provided either with a hot air supply K at the bottom or with a hot water supply K' at the top or with both,to keep the temperature of this still at the desired degree (l50 for example) for the separation of the lighter products from the distillate therein.

While I have represented a group of four connected stills, it may be found desirable to increase or decrease the members above or below that number.

The degrees of temperature which I have suggested are those at which the products known as residuum, heavy distillate, kerosene and naphtha will fail to pass oif, the product which passes off from the still D at 150 temperature beinglight benzine. In operation the still A having been raised to the desired temperature by the superheated steam, the oil is admitted, and after passing down the plates and being thoroughly exposed to the temperature, the residuum passes off through the outlet pipe az into the discharge pipe G. The products which have become vaporized at the temperature of the first still pass on into the second still when, either by the cooling of the superheated steam and vapors from the first still, or by the combined effect of such cooling and the admission of cooler steam through the pipe I', a certain portion passes ofi in liquid form froin the bottom of the still and may be collected as ICO mnioa'ton with the firs't member, means for maintaining a reduced degree'of `temperature in succeedingl members, suitable discharge pipes leading independently from the bottoms of the several members, a condenser and a pipe leading` from the fin'al member into the condenser, substantially as set forth.

ROBERT A. CHESEBROUGH.

Witnesses:

FREDK. HAYNEs, O. E. LUNDGREN. 

